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| 1 | Promises and paradoxes of regulatory T cells in inflammatory bowel disease显示文摘Since their discovery two decades ago,CD4+CD25+Foxp3+ regulatory T cells(Tregs) have become the subject of intense investigation by immunologists. Unlike other T cells,which promote an immune response,Tregs actively inhibit inflammation when activated by their cognate antigen,thus raising hope that these cells could be engineered into a highly targeted,antigenspecific,immunosuppressant therapy. Although Tregs represent less than 10% of circulating CD4+T cells,they have been shown to play an essential role in preventing or limiting inflammation in a variety of animal models and human diseases. In particular,spontaneous intestinal inflammation has been shown to occur in the absence of Tregs,suggesting that there may be a Treg defect central to the pathogenesis of human inflammatory bowel disease(IBD). However,over the past decade,multiple groups have reported no qualitative or quantitative deficits in Tregs from the intestines and blood of IBD patients to explain why these cells fail to regulate inflammation in Crohn's disease and ulcerative colitis. In this review,we will discuss the history of Tregs,what is known about them in IBD,and what progress and obstacles have been seen with efforts to employ them for therapeutic benefit. | James D LordJ | 2015 | World Journal of Gastroenterology2015，21，40： | 6 |
| 2 | Immune cell interplay in colorectal cancer prognosis显示文摘The immune response to colorectal cancer has proven to be a reliable measure of patient outcome in several studies. However, the complexity of the immune response in this disease is not well understood, par-ticularly the interactions between tumour-associated cells and cells of the innate and adaptive immune system. This review will discuss the relationship betweencancer associated fibroblasts and macrophages, as well as between macrophages and T cells, and demonstrate how each population may support or prevent tumour growth in a different immune environment. | Samuel E Norton Kirsten A Ward-Hartstonge Edward S Taylor Roslyn A Kemp | 2015 | World Journal of Gastrointestinal Oncology2015，7，10： | 1 |
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